Chronic Bad Breath
Chronic bad breath is often a sign that something else is wrong with your body. Sinus or tooth infections are the most likely culprits. Go see your dentist if you have also been experience any toothpain, or see your doctor if you have nasal problems.
Bad breath can also be a warning sign of gastrointestinal problems, so if you stink for no appearant reason you really should get to a doctor.
Other Advice:
Don't forget to brush your tongue when you are brushing your teeth.